The inlet gas hardware includes the following components:
- Argon gas valves—The data system controls the valves that regulate the argon gas pressure used for collisional dissociation. You can set the collision gas pressure (CID gas) in the Tune application.
- Argon gas (135 ±70 kPa [20 ±10 psi], 99.995% minimum purity) enters the left side of the MS through a 1/8 in. port. The valves for the collision gas control the flow of argon gas into the Q2 collision cell.
- Nitrogen gas valves—The data system controls the valves that regulate the nitrogen pressure. You can set the gas flow rates in the Ion Source pane of the Tune application.
- Dry nitrogen gas (690 ±140 kPa [100 ±20 psi], 99% purity) enters the left side of the MS through a 1/4 in. port. The valves for the sheath, auxiliary, and sweep gases control the flow of dry nitrogen gas into the API source. For information about the purpose of the three nitrogen gas flows, see Sheath gas, aux gas, and sweep gas flow paths.
- Vent valve—The solenoid-operated vent valve vents the vacuum manifold with filtered air. The vent valve is closed when the solenoid is energized. The vent opens when the MS no longer receives external power, as with a power failure or when you turn off the main power switch.
The external gas line connections are on the left side of the MS.
| No. | Description | No. | Description |
|---|---|---|---|
1 | Argon gas inlet | 2 | Nitrogen gas inlet |